Tool for forming cold-packed pipe-joints



(No Model.) 2 Sheets-Sheet '1.-

A. N. RANKIN.

TOOL FOR FORMING GOLD PACKED PIPE JOINTS.

No. 376,609. Patented (13111.17, 1888.

.9 We 1;, Ina/anti: 1 Z.

2 Shts-Sheefl 2.

(No Model.)

A. RAN-KIN. TOOL FOR'FORMING GOLD PAOKED' PIPE JOINTS. No. 376,609;

Patented Jan. 17, 1888.

II/III ///////////////////////II/I/////////////////////// N4 PETERS,Fhofo-Ulhogmpher. Wilhingmn. n. c

ANDREW NERVA RANKIN,

PATENT FFICE OF JAMAICA, NEW YORK.

TOOL FOR FO RMlNG COLDcPACKED PIPE-JOINTS.

SPECIFICATION forming part of Letters Patent No.'376,609, dated January17, 1888. Application filed March 9, 1887. Serial No. 230,246. (Nomodel.)

- fication.

This invention relates to tools or devices for forming the cold-packedpipe-joint patented to me on August 10, 1886, No. 347,060. In the patentin question I have described and claimed a pipe-joint wherein a band oflead is cast around the spigotend of an iron pipe, whereby a perfectconnection between said pipe and band is provided. In connecting thespigot end of the pipe to its companion seotion I employ a tool by whichthe said lead band is upset against the interior walls of the socket orhell of the companion section,whereby a close fit between said lead bandand socket is provided. In the present instance I desire protection forcertain toolsor devices by which I am enabled to expeditiously andsatisfactorily, first, cast the lead band upon the spigot end of thepipe; second, effectually upset said band, so as to form a close contactbetween it and the walls of the socket or bell of the conpanion'section; and, third, to cast said lead band upon the spigot endin such manner as to provide a space between the end of the lead band atthe extremity of the pipe end and the base of the socket or bell, sothat a slip joint is provided which will permit the pipe-sections tocontract or expand with the variations of temperature. I

The objects of my invention are sufficiently set forth in th'eabovestatement; and the invention consists of the features specificallydefined in the claims at the end of this specification.

In the accompanying drawings,whichform a part of this specification, andin which like features are indicated by like letters of reference in theseveral views, Figure l is a crosssection of the mold whereby the leadband is cast upon the spigot end of the pipe, the pipe in said viewbeing shown at A. Fig. 2 is a longitudinal section of a section of pipewith the mold in posit-ion. The latter is also in longitudinal section,showing the lead band cast on the pipe end. Fig. 3 is a longitudinalsection of pipe provided with a soft-metal band. Fig. 4 is an end viewof the device for upsetting the soft-metal band a against the innerwalls of the socket orbell of the pipe. Fig. 5 is a side elevation ofthe upsetting device shown in Fig. 4.. Fig. 6 is a fragmentary sectionof Fig. 4, showing the means of connecting the several parts of saidupsetting device together. Fig. 7 is a longitudinal sectional view oftwo sections of pipe provided with a joint made as herein described andhaving the upsetting device in position. Fig. 8 is an end view of mydevice for producing the space between the end of the band a and thebase of the socket or bell, the pipe A in said View being incross-section. Fig. 9 is a longitudinal sectional view of parts of twosections of pipe, showing the device in position, whereby the spacebetween the end of the soft-metal band a and the baseof the socket orhell is provided. Fig-10 is a side elevation of the device lastmentioned, and Fig. 11 is a side view of the ring or sleeve which isused for compressing the limbs of said device when it is to be withdrawnfrom the pipes.

Referring to the drawings, the letter A in dicates the ironpipe-sections, and B the mold for casting the soft-metal band a upon thespigot end of the pipe-section. The mold B may be made of any suitablematerial, and, as shown, it is formed in twosections hinged together,and is secured in position around the end of the spigotend of the pipeby means of a suitable thumb;screw, b.

0 represents ahinged ring, made of brass or of molten soft metal fromescaping from the in- 5 terior of the mold between said hinged ringO andthe outer surface of the pipe. The ring 0 is also made in sections andhinged, in order to be easily placed upon the pipe end and removedtherefrom. Upon the outer front surface of said hinged ring 0, or uponthe interiorsurfacc of the mold B,at its rear side, there is provided adovetail groove, (1, which is fitted with packing, preferably ofasbestus, the purpose of which is to prevent the molten soft metal fromescaping between the mold and ring 0, all as shown in Fig. 2. The frontof mold B projects within the line formed by the inner circumference ofpipe A at its end, when the said mold is placed in position upon thepipe end. This portion of the mold is marked 0 in the drawings.

It will be observed by referring to Fig.2 that the part cof mold I isnot in contact with the end of the pipe-section. A portion of the spacethus left is occupied when the mold isin position for casting the leadband by a disk forming a partof a spring-plug, D. This disk is markedfin the drawings, and its function is to overlap the end of the pipe B,as stated, in order that when the soft metal is being cast around thepipe end it cannot escape. As said disk f only partly overlaps the endof the pipe-section, the molten metal flows round the pipe end andoccupies a space not taken up by said disk. By this means the softmetalband a is caused to partly overlap the end of the pipe, as shown at 9,Fig. 2. At the back of the mold the hinged ring C extends sufficientlybeyond the offset upon the interior surface at the rear of the mold toprevent the soft-metal band (t coming in contact with the surface of thepipe at that point. This is the principal function of the hinged ring 0,and by this means I am enabled to so cast the soft-metal band a upon thepipe end that for a small distance at its rear itwill have no contactwhatever with the surface of the pipe. The purpose of this peculiarityof the band a will be presently explained.

The spring-plug 1) is placed in the end of the pipe preliminary toaffixing the mold in position, and in addition to the disk f itcomprises a series of springs, 71. After the softmctal band a has beencast and the mold B removed from the pipe end, the spring-plug D is alsoeasily removed, as will be obvious from an inspection of Fig. 2 of thedrawings.

In Fig. 3 the pipe A is shown provided with the soft-metal band a, castthereupon by means of the molding devices just described. It will benoticed that said soft-metal band partly overlaps the end of the saidpipe-section, and for a short distance at its rear it is not in contactwith the pipe-surface.

In Fig. 7 I show two companion sections of pipe, which illustrate theappearance of my joint when it has been perfected by means of the toolswhich will now be described. In this view the soft-metal band a is inposition upon the pipe end and the device by which the upsettingoperation has been performed has not yet been removed. This view alsoshows the space between the base of the socket or bell and the end ofthe pipe clothed with the soft-metal band a, which enables thepipe-sections to contract and expand under variations of temperature.This space I have marked In. and the manner in which it is produced willbe presently explained. By referring to this View, Fig. 7, it will benoticed that the softmetal band a has been compressed or compacted bythe action of the upsetting device, so that its rear end is snugly incontact with the surface of the spigot end, where, previous to its beingoperated upon by the upsetting device,it was notin contacttherewitlnasshown in Fig. 3-that is to say, in Fig. 7 the entire end ofthe spigot of the pipe is covered by the soft metal band a, this resulthaving been attained in the act of using the aforesaid mold and theupsetting device.

The tool or device by which I perform the upsetting operation is shownin Figs. 4, 5, and 6. This device is formed in sections, so that it maybe readily placed in position upon the pipe and removed therefrom. Itcomprises the main portion Z and the front extension m, which latterportion is provided upon its edge with serrations n, in order that itmay more effectuallypcrformthisfnnction. The sections of this upsettingdevice are connected together by the following means: Upon a section ofthe rear part, Z, there are formed integral therewith lugs or ears 0, ofthe form shown in Fig. 5, having the hammering surfaces curved andterminating in flat surfaces, as shown at 1). Upon another section thereare formed lugs g, which are slotted, as shown in Fig. 6. The rear endsof the lugs are rounding, as shown in Fig. 5, and the lower surfaces areslightly inclined from the front to the rear, as also shown in Fig. 5.These part scciionsarc held together by screw-bolts 1, smaller incross-see tion than the slots in the lugs q, so as to pass looselythcrethrongh, and by reason of thepeculiar construction of the lugs qthe parts are tightened by means of the screw-bolts 1*, the effect beingto slightly throw apart the sections of the serrated side extension m,and thereby enlarge the circu inference of the serrated ealking-tool.This will be found necessary in the ealking process, in order that theentire rear end of the soft-metal band a may be uniformly acted upon,especially that part which does not adhere to the spigot.

The tool or device whereby the space between the base of the socket orhell and the rear end ofthe band a is provided for the purpose ofpermitting contraction and expansion is shown in Figs. 8, 9, 10, and11.. In these views,Ais the pipe, a the soft-metal band, and it thespace at the base of the socket or bell. In forming this space in theact of connecting two companion sections of pipe I place within thespigot end of the pipe the device E,which comprises a sectional ring, 8,and a series of bars or rods, t, which are connected together at theirrear ends by means of spring-plates u. \Vhen this device is placed inthe pipe, the spring-joined rods t are expanded, so as to bring theseveral parts of the sectional ring 8 in position, as shownin Fig. 8.The ring sis composed of a number of segmental parts, which are causedto overlap one another, as shown in dotted lines in Fig. 8. Eachsegmental section is provided with a lug, v, to which one of the bars 25is secured.

Instead of the bar being formed independent of the segmental section andsecured thereto,said section maybe made integral with the bar. The rearends of the bars t are connected to the spring-plates u, so that thetendency of the bars is to separate or spring outward at their frontends,which carry the segmental ring while the joint is being formed, andenable compression for their removal. The.ring s, when in positionwithin the pipe end, bears upon the extreme surface or end of thesoft-metal band a, and also against the base of the socket or bell, asshown in Fig. 9. The ring or sleeve shown in Fig. 11 (marked '03) isemployed to facilitate the removal of the device now being describedfrom the pipes after the formation of the joint between the sections.

In the use of the device just described, as before stated, it is placedin the spigot end of the pipe, which is clothed with the soft-metal banda, and it will then occupy the position with reference tothe spigot orbell of the companion section of the pipe, when the spigot is enteredtherein, shown in Fig. 9. In this position of the tool the upsetting orcalking operation is performed, preferably, by the tools shown in Figs.4, 5, and 6, and after that manipulation has been accomplished thespaceforming device is removed by moving the ring or sleeve 00 towardthe front of said device, being toward the segmental ring .9, the effectof which is to "compress the spring- 0 joined bars t and contract thesegmental ring s, so that it may be readily caused to assume a diameterless than the bore of the pipe, and thereby permit its readywithdrawalfrom the perfected joint. The joint,when thusformed, as will be obviousfrom an inspection ofFig. 9,

.is provided with a space between the base of the socket 0r bell and theend of the soft-metal band a. I thus afford a very effective guardagainst bursting of the joints when the pipes are subjected -tocontraction and expansion with the variations oftemperature, since it isobvious that there is room for the pipe-sections to move'upon oneanother, there being no obstruction either at the back or infront of thesoft-metal joint a.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is 7 1. A mold for casting asoft-metalbandupon the spigot end ofa pipe-section, comprising the sectionalportions B,'the hinged ring '0, and suitable packing placed between saidring and mold and said ring and pipesection, substantially as set forth.a

2.-The mold B and ring 0, the said mold having an inwardly-projectingfront, which,

when the mold is placed in position upon the pipe end, extends below theline of theloore of the pipe, combined with the disk f, secured withinthe bore of the pipe between the front of the mold and the end of thepipe, all the parts being adjusted s9 that the soft-metal band a may beformed to overlap the front end of the pipe-section, and also beseparated a short distanceat the rear from the pipe-surface, enablingthe calking to act thereon against the inside of the socket or hellwithout disturbing the adhesion by shrinking of the balance of thesoft-metal band to the spigot, substantially as set forth.

3. The mold 13, provided with packing at its rear, combined with thehinged ring 0, likewise provided with packing, the said hinged ringarranged to extend sufficiently within said mold, whereby thesoft-1netal band a at its rear end will not come in contact with the.pipesurface, substantially as and for the purpose set forth.

4. The mold B, having an inwardly-projecting front portion, combinedwith the hinged ring 0 and spring-plug D, the latter comprising a disk,f, of less diameter than the external diameter of the pipe end, andsprings D, whereby a'line ofsoft-meta-l packing is provided from thepoint of calking to the base of the socket or bell, substantially as setforth.

5. The sectional serrated upsetting device herein described, comprisinga rear portion, 1, and a front portion, m, the former provided with lugs'0 and its companion section with lugs q, the said lugs q being slottedand having an inclined under surface, as shown, and

adapted to receive screw-bolts, substantially as set forth.

6. The sectional upsetting device comprising the rear portion, 1, andside extension m, the latter provided upon its edge a with serrations,substantially as set forth.

7. The serrated sectional upsetting device provided with lugs 0, whoserear ends are curved and terminateiu a vertical plane, and with slottedlugs q, whose terminations are rounding and whose lower surfaces areinclined from the front to the rear, combined with screw-bolts having asmaller crosssection than the slots of the lugs q, substantially as setforth.

8. A tool or device for forming a space between the base of the socketor hell of one section of pipe and the soft-metal clothed spigot end ofits companion section, comprising a segmental expanding and collapsiblering, a series of bars, t, and spring-plates connecting the rear ends ofsaid bars, substantially as set forth.

9. The segmental expandingand collapsible ring, the sections whereof areprovided with .lugs, and a series of bars secured to said segstantiallyas set forth.

10. The tool or device whereby a space may be formed between the base ofthe socket or Signed at New York, in the county of New hell of onesection of pipe and the soft-metal York and State of New York, this 7thdayof 1o clothed end of the spigot; of its companion March, A. D. 1887.

section, comprising a collapsible and expand- T 1" r 7 T T ing segmentalring, bars connected to said seg- A) DLLW' A RAB ments or integraltherewith, spring-plates at l \Vitnesses:

the rear end of said bars, and the ring or sleeve IIUGo KOELKER,

50, substantially as set forth. 1 J. E. M. BOWEN.

